Swiss. A fine 18K gold, enamel and diamond-set keyless lever pendant watch with chain

Swiss. A fine 18K gold, enamel and diamond-set keyless lever pendant watch with chain
Unsigned, circa 1900
With nickel-finished jewelled lever movement, gold cuvette, the gilt matte dial with Arabic numerals, blued steel moon-style hands, subsidiary seconds, in circular case with white enamel decorated bezel and rim, the translucent pink guilloché enamel reverse centred by a finely detailed white gold mounted filigrée diamond-set floral decoration, all set within a fine 18K white gold and diamond-set filigrée outer frame, diamond and sapphire-set crown, together with an 18K yellow gold, pink and white enamel decorated chain, unsigned
37 mm. diam.